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		<title>BeyondMath</title>
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		<h3> 习 题 1 - 1</h3>
		<p>1.设 A = ( - ∞, - 5 ) ∪ ( 5, + ∞ ), B= [ - 10, 3 ),写出A ∪ B, A ∩ B,A \ B,
		及A \ ( A \ B )的表达式.
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